int main(int argc, char **argv)
{
struct passwd *pw;
char user[64], password[64], crypted[64];
char *cp;
if (argc != 2)
{
printf("Usage: passwd <user>\n");
return 1;
}
strcpy(user, argv[1]);
if ((pw = getpwnam(user)) == NULL)
{
printf("No such user.\n");
return 1;
}
if (strcmp(pw->pw_passwd, "*"))
{
strcpy(password, getpass("Old password:"******"Incorrect password.\n");
return 1;
}
}
strcpy(password, getpass("New password:"******"Re-type new password:"******"New passwords don't match.\n");
return 1;
}
strcpy(crypted, crypt(password, SALT));
if (strcmp(pw->pw_passwd, crypted) == 0)
{
printf("Password unchanged.\n");
return 1;
}
if (setpwnam(user, crypted))
{
printf("Update of passwd file failed.\n");
return 1;
}
printf("Password changed.\n");
return 0;
}
int
main(int argc, char *argv[]) {
struct passwd *pe;
uid_t gotuid = getuid();
char *pwdstr = NULL, *cryptstr, *oldstr;
char pwdstr1[10];
char *user;
time_t tm;
char salt[2];
int force_passwd = 0;
int silent = 0;
int c;
int opt_index;
int fullname = 0, shell = 0;
static const struct option long_options[] =
{
{"fullname", no_argument, 0, 'f'},
{"shell", no_argument, 0, 's'},
{"force", no_argument, 0, 'o'},
{"quiet", no_argument, 0, 'q'},
{"silent", no_argument, 0, 'q'},
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
sanitize_env();
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
optind = 0;
while ((c = getopt_long(argc, argv, "foqsvV",
long_options, &opt_index)) != -1) {
switch (c) {
case 'f':
fullname = 1;
break;
case 's':
shell = 1;
break;
case 'o':
force_passwd = 1;
break;
case 'q':
silent = 1;
break;
case 'V':
case 'v':
printf("%s\n", util_linux_version);
exit(0);
default:
fprintf(stderr, _("Usage: passwd [-foqsvV] [user [password]]\n"));
exit(1);
} /* switch (c) */
} /* while */
if (fullname || shell) {
char *args[100];
int i, j, errsv;
setuid(getuid()); /* drop special privs. */
if (fullname)
args[0] = _PATH_CHFN;
else
args[0] = _PATH_CHSH;
for (i = optind, j = 1; (i < argc) && (j < 99); i++, j++)
args[j] = argv[i];
args[j] = NULL;
execv(args[0], args);
errsv = errno;
fprintf(stderr, _("Can't exec %s: %s\n"), args[0], strerror(errsv));
exit(1);
}
switch (argc - optind) {
case 0:
/* Why use getlogin()? Some systems allow having several
usernames with the same uid, especially several root accounts.
One changes the password for the username, not the uid. */
if ( !(user = getlogin()) || !*user ) {
if ( !(pe = getpwuid( getuid() )) ) {
pexit(_("Cannot find login name"));
} else
user = pe->pw_name;
}
break;
case 1:
if(gotuid) {
printf(_("Only root can change the password for others.\n"));
exit (1);
} else
user = argv[optind];
break;
case 2:
if(gotuid) {
printf(_("Only root can change the password for others.\n"));
exit(1);
} else {
user = argv[optind];
pwdstr = argv[optind+1];
}
break;
default:
printf(_("Too many arguments.\n"));
exit (1);
} /* switch */
if(!(pe = getpwnam(user))) {
pexit(_("Can't find username anywhere. Is `%s' really a user?"), user);
}
if (!(is_local(user))) {
puts(_("Sorry, I can only change local passwords. Use yppasswd instead."));
exit(1);
}
/* if somebody got into changing utmp... */
if(gotuid && gotuid != pe->pw_uid) {
puts(_("UID and username does not match, imposter!"));
exit(1);
}
if ( !silent )
printf( _("Changing password for %s\n"), user );
if ( (gotuid && pe->pw_passwd && pe->pw_passwd[0])
|| (!gotuid && !strcmp(user,"root")) ) {
oldstr = getpass(_("Enter old password: "******"Illegal password, imposter."));
exit(1);
}
}
if ( pwdstr ) { /* already set on command line */
if ( !force_passwd && !check_passwd(pwdstr, pe->pw_passwd, user, pe->pw_gecos) )
exit (1);
} else {
/* password not set on command line by root, ask for it ... */
redo_it:
pwdstr = getpass(_("Enter new password: "******"Password not changed."));
exit(1);
}
if ( (gotuid || (!gotuid && !force_passwd))
&& !check_passwd(pwdstr, pe->pw_passwd, user, pe->pw_gecos) )
goto redo_it;
xstrncpy(pwdstr1, pwdstr, sizeof(pwdstr1));
pwdstr = getpass(_("Re-type new password: "******"You misspelled it. Password not changed."));
exit(1);
}
} /* pwdstr i.e. password set on command line */
time(&tm); tm ^= getpid();
salt[0] = bin_to_ascii(tm & 0x3f);
salt[1] = bin_to_ascii((tm >> 6) & 0x3f);
cryptstr = crypt(pwdstr, salt);
if (pwdstr[0] == 0) cryptstr = "";
#ifdef LOGALL
openlog("passwd", 0, LOG_AUTH);
if (gotuid)
syslog(LOG_NOTICE,_("password changed, user %s"),user);
else {
if ( !strcmp(user, "root") )
syslog(LOG_WARNING,_("ROOT PASSWORD CHANGED"));
else
syslog(LOG_NOTICE,_("password changed by root, user %s"),user);
}
closelog();
#endif /* LOGALL */
pe->pw_passwd = cryptstr;
#ifdef DEBUG
printf (_("calling setpwnam to set password.\n"));
#else
if (setpwnam( pe ) < 0) {
perror( "setpwnam" );
printf( _("Password *NOT* changed. Try again later.\n" ));
exit( 1 );
}
#endif
if ( !silent )
printf(_("Password changed.\n"));
exit(0);
}
